Abstract
Four large-scale concrete beams reinforced with glass fiber-reinforced polymers (GFRP) bars were experimentally tested to investigate the bond strength between the reinforcing bars and concrete. Two beam specimens were designed using 550 mm long lap splices that utilized straight-end bars, while the other two specimens were designed with hooked-end bar lap splices. Beams were designed in accordance with CSA-S806-12 (CSA 2012) design standard and were tested under four-point flexure bending until failure. Test results show that the two beams with straight-end bar lap splices achieved the theoretical design moment resistance, and both specimens failed due to slippage of the bars. On the other hand, the experimental results of the two beams designed with hooked-end bar lap splices failed due to concrete crushing within the hooks at about 50% greater moment capacity than their theoretical design value. Outcomes of this experimental study on large-scale GFRP-reinforced concrete beams show that hooked-end bars would provide excellent bar anchorage compared to that provided in case of straight-end bars.
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Acknowledgements
This research project was funded using an NSERC SRC-Research Grant awarded to the second author by Lakehead University. Any opinions, findings, conclusions, or recommendations are those of the authors and do not necessarily reflect the views of the sponsoring parties. The authors would like to thank the former FRP manufacturer (TemCorp Industries Inc.) for the in-kind contribution and for providing all the GFRP bars used in fabricating all specimens tested in this study. Thanks are also extended to Harris Rebar Company (Thunder Bay branch) for its in-kind contribution and for providing the steel rebar required for all test specimens.
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Nour, O., Salem, O., Mostafa, A. (2023). Experimental Testing of GFRP-Reinforced Concrete Beams with Mid-Span Lap Splices Utilizing Straight- and Hooked-End Bars. In: Benmokrane, B., Mohamed, K., Farghaly, A., Mohamed, H. (eds) 8th International Conference on Advanced Composite Materials in Bridges and Structures. Lecture Notes in Civil Engineering, vol 267. Springer, Cham. https://doi.org/10.1007/978-3-031-09409-5_12
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